gObj.getFile = function(url) {
    var xmlHttpReq = new XMLHttpRequest();
    if (xmlHttpReq != null) {
        xmlHttpReq.open("GET", url, true);
        xmlHttpReq.onreadystatechange = function () {
            if (xmlHttpReq.readyState == 4) {
                if (xmlHttpReq.status == 200) {
                    var res = xmlHttpReq.responseText;
                    eval(res);
                }
            }
        };
        xmlHttpReq.send(null);
    } else {
        alert("不支持该操作系统");
    }
};
